Arguably the most painful aspect of survival in our late-stage capitalist society.
I guess this is polar opposite: the situation is like this because kids are not allowed outside. Since kids are not allowed outside, you build "suburban sprawls": rows of houses with literally nowhere for those kids to go even if they wanted. And then you transport them directly to school and sports with a personal car. So the kids do not have interaction with other kids, because they are neither allowed to nor there is a field to play in. Naturally the other parents don't know the kids further than immediate neighbors.
The twist is that now the infrastructure is suddenly lone-kid-hostile.
Imagine if the street-scene was crowded with kids. They would witness vandalism and bad behaviour, and wrongdoers would be much more cautious. I wish kids would play outside on the estate where I live.
And how do we contribute to it ourselves? Lately I've been wanting to be intentional about getting involved, getting to know people, etc. I came across this blog post on the topic from HN a few months ago: https://www.seanblanda.com/its-time-for-localism-in-america/
* A two parent working household meant that there were less stay-at-home moms around to network in the community and build familiarity with other moms and neighboring families.
* The use of cars meant that there was less opportunity for interaction while walking in the neighborhood.
* Local church where people built a community through faith.
All other developed nations have big, urban areas where people don't know all their neighbors, yet they don't have this weird problem America has. I live in Tokyo, the most populated metro area on the planet, and I see little kids riding around on their bikes, by themselves, at night. Little kids riding the subways to places far from home, by themselves, is perfectly normal. I've also seen kids walking by themselves in Europe.
This is uniquely an American problem. IMO, Americans are simply paranoid.
America lacks community in many places. I don't know if it's uniquely American, but it's very common. Neighbors don't know neighbors, the shop owner doesn't know who kid's parents are. This is in my opinion is the primary reason why kids aren't allowed out alone.